// let str:string='str';
// const num:number=1;
// const bol:boolean=false;
// let und:undefined=undefined;
// und=null;
// let nu:null=null;
// nu=undefined;

// let sym:symbol=Symbol('name');
// let int1:bigint=1000n;
// let int2:bigint=999n;
// let c=int1+int2;
// console.log(c);


let str:string='hello';
let str2:string='word'
str+=str2;
let num:number=666;
let num2:number=999;
let num1:number=num+num2;

const bol:boolean=false;

let und:undefined=undefined;
let nu:null=null;
und=nu;

let sym:symbol=Symbol('name');

let int1:bigint=10n;
let int2:bigint=BigInt(90)
let int:bigint=int1+int2;


